Question

Explain how to find the exact value of sin120

Answer 1

@akhaliq99

Answer 2

Isn't it the same as sin30?

Answer 3

so

sin(120) = sin(60)

Answer 4

How do you find sin 0?

Answer 5

there's no triangle?

Answer 6

sin(60) you mean?

Answer 7

no, sin 0

Answer 8

oh sin(0) = 0

Answer 9

look at the unit circle, at the angle theta = 0 the height of the "triangle" there is 0

Answer 10

but how do you know that? cos 0 is 1 for some reason i don't know

Answer 11

sin(theta) corresponds to the height of the triangle on the unit circle

Answer 12

now if theta was theta = 1, then you'd have something like this

Answer 13

as theta gets smaller and smaller, so does sin(theta)

so that's why sin(0) = 0

Answer 14

huh? but how is there a triangle if the angle is 0?

Answer 15

there isn't, but try finding sin(1), sin(0.5), sin(0.01), sin(0.001) and tell me what you get

Answer 16

you can't tell me what to do

Answer 17

I'm just trying to get you to think